The vote is required after the trade treaty’s environmental watchdog concluded there were serious questions about how the federal government enforces the Fisheries Act in relation to the massive ponds.

Scientific evidence suggests the ponds that contain water used in oilsands production are leaking into the Athabasca River.

WATCH: Freeland says no deal yet, but parties committed to get NAFTA agreement

The NAFTA body began its examination after a complaint from Canadian environmentalists.

A previous effort to use NAFTA to force Ottawa to crack down on tailings ponds stalled when the three countries voted against pursuing the matter further.